On my current assignment (Lloyd Center, Portland) I have the choice between a Doubletree, a CY and a RI. I'm splitting my time 50:50 between the DT and the CY (both have preferred rates with the client) as I don't know where my next assignment will be, and I'd rather hit top tier with 2 programs than one so I have double the chance of being top-tier with the "next" hotel.
So, to the choice between the CY and the RI ... basically it comes down to $$$. The break-even point where the RI comes out ahead is somewhere near four nights a week and I'm only (???) doing three. If the $$$ were close I'd jump at the RI but I'm not sure I could swing it where they fall right now.
The ONE thing I really like about CYs is the in-house laundry. Go up to a FS (or a Doubletree or FS Hilton) and you lose that - and my stuff isn't so expensive that dropping twenty or thirty for valet laundry makes much sense when a handful of quarters gets the job done. So I can leave my stuff at the hotel over the weekend, do laundry Monday night (when I'm not up to doing anything anyway) and I'm travelling much lighter.